کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8152477 | 1524753 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Asymmetry induced intrinsic magnetodielectric effects in manganite - Barium titanate solid solutions
ترجمه فارسی عنوان
عدم تقارن منجر به اثرات ذاتی مغناطیسی دی الکتریک در محلول جامد منگنات - تیتانات باریم شده است
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کلمات کلیدی
نامتقارن، اثرات مغناطیسی الکتریکی، راه حل های جامد، فاز شش ضلعی، محاسبات اولیه اول،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
Multiferroics, in which off-center magnetic ions induced ferroelectricity, are believed to exhibit enhanced magnetoelectric (ME) or magnetodielectric (MD) effects because their ferroelectricity and ferromagnetism are driven by the same originations. In this paper, multiferroics with off-center Mn ions were obtained in hexagonal manganite-barium titanate solid solutions. As an external magnetic field (H) was applied, intermediate and high frequency MD effects were observed. The MD (MD(%)â¯=â¯(ε(Hâ¯=â¯3.5 kOe)â¯ââ¯Îµ(H = 0 Oe))â¯Ãâ¯100/ε(H = 0 Oe)) values at 10â¯MHz frequency were 3.37%, 3.21% and 2.65% for the three samples, respectively. The further discussion indicated that the MD effects did not originate from some extrinsic source such as grain boundary magnetoresistance (MR) and contributions from the electrode, but mainly attributed to the intrinsic ME coupling such as magnetic-field-induced variations of asymmetric hopping. The first-principles calculations also confirmed that the asymmetry of coplanar octahedrons aggravated when Mn ions occupied the off-center site in the hexagonal phases, especially in 0.1La0.7Ca0.3MnO3â¯ââ¯0.9BaTiO3 solid solutions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 468, 15 December 2018, Pages 168-174
Journal: Journal of Magnetism and Magnetic Materials - Volume 468, 15 December 2018, Pages 168-174
نویسندگان
Ling Zhou, Chi Chen, Qiuyun Fu, Dongxiang Zhou, Fei Xue, Yahui Tian, Mingzhi Zhang, Geng Wang, Mei Wang,